AT&T Inc.’s wireless data network is down in parts of the eastern U.S., according to user reports and the company.

AT&T spokesman Michael Coe said the company was looking into the problem, but could not describe its extent.

Users on various online forums reported outages in Massachusetts, New York, Rhode Island, Pennsylvania, Maryland, Virginia, Illinois and Missouri.

Voice calls were still possible, but Web surfing and e-mail were not. Most of the outage reports came from iPhone users.